Pond 2b Reservoir Report

Last Updated: December 5, 2025

Pond 2b, located in Benicia, California, is a privately owned earth dam completed in 1975 with a primary purpose of water supply.


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Summary

Standing at 55 feet high and with a hydraulic height of 51 feet, this dam has a storage capacity of 89 acre-feet and covers a surface area of 7 acres. It serves the functions of tailings and water supply, contributing to the management of water resources in the region.

Managed by the California Department of Water Resources and regulated by the Safety of Dams division, Pond 2b is inspected regularly to ensure its structural integrity and compliance with safety standards. With a low hazard potential and a satisfactory condition assessment, the dam presents a reliable infrastructure for water storage and supply. Despite its modest size, Pond 2b plays a crucial role in supporting the local water supply needs and maintaining the ecological balance in the area.

As a key component of the water infrastructure in Solano County, Pond 2b serves as a vital resource for the community, particularly in times of water scarcity and emergencies. Its strategic location near Trib Suisun Bay and association with the San Francisco District of the US Army Corps of Engineers highlight its importance in sustaining water resources and mitigating the impact of climate variability in the region. With ongoing monitoring and maintenance, Pond 2b remains a crucial asset for water management and climate resilience efforts in California.

Year Completed

1975

Dam Length

490

Dam Height

55

River Or Stream

Trib Suisun Bay

Primary Dam Type

Earth

Surface Area

7

Hydraulic Height

51

Drainage Area

0.26

Nid Storage

89

Hazard Potential

Low

Nid Height

55
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.

Hazard Potential Classification

High
Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.